The Volvo WAH uses 1156 bulb sizes for both front and rear turn signal applications. The replacement chart covers 1996 to 1998 model years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 1156 is the sole bulb type across all listed positions and model years for the Volvo WAH, covering both front and rear turn signal applications from 1996-1998.
The 1156 is a single-filament bulb, meaning it performs only one lighting function, which is consistent with its dedicated turn signal role rather than a combined stop/tail application.
The 1156 operates at 12 volts and draws 21 watts, placing it within the standard range for incandescent automotive signal bulbs.
The 1156 uses a BA15s bayonet base, a single-contact fitting where the "s" denotes a single pin, distinguishing it from the dual-contact BA15d base used in other bulb types.
The 1156 conforms to ANSI standards applicable in the United States and Canada, indicating the specification follows North American automotive lighting norms.
The BA15s base of the 1156 is not interchangeable with visually similar bayonet-base bulbs such as the 1157, which uses a BA15d dual-contact base and carries a second filament for combined stop and tail functions.
The front and rear turn signal positions on the Volvo WAH share the same 1156 bulb specification across all three listed model years, indicating uniform fitment throughout the 1996-1998 range.